Radio apparatus



y 13, 17950 I s. ZINDEL, JR 2,515,816

mm APPARATUS Filed March 4, 1948 2 Sheets-Sheet 1 JNVENTOR. qcofiqa 27/7061. J'fi.

wwlhw Jilly 1a, 1950 1 JNVENTOR.

BY oan/h Patented July 18, 1950 STATES PATENT OFFICE RADIO APPARATUS George Zindel, J12, Fox chase Manor, Pa., as-

s'ignor to Philco Corporation, Philadelphia, Pa., a corporation of Pennsylvania Application March-4, 1948, Serial-No. 13,013

Claims, l

The present invention relates to radio apparatus and, particularly, to radio receivers. More specifically, the invention has to do with improvements in the construction and assembly of parts which go into the making of radio receivers. 7

It is the primary object of the invention to provide a nov'el'disposition and relation between aradio chassis and a loud-speaker and, also, to proyidje a novel arrangement and association of these'p'arts with elements of a cabinet so as to produce a self-contained radio receiver of distinctive compact structure. To that end, the invention utilizes an organization in which the chassis and the speaker are disposed and related in such a manner as to provide a compact unit, and in which cabinet forming members are so arranged and associated with such unit as to produce a finished unitary assembly, the overall dimension of which does not greatly exceed that of said unit.

Another object of the invention is to provide a radio receiver of the above mentioned type, which is particularly characterized by the simplicity of its construction and by the economical use of materials employed for its production. Especially, the invention makes it possible to reduce, appreciably, thenumber of parts necessary for complete assembly of the radio receiver and to utilize inexpensive cabinet parts which can be readilyput together and associated with the radio chassis to house the same.

.Another and more specific object of the invention resides. in the provision of a selfcontained radio receiver in which certain parts are advantageously employed to perform several useful functions in the assembly and in the operationof such areceiver and, thus, effectively contribute toward the provision of a simplified compact unitary structure. For example, in accordance with this object of the invention, the loud-speaker mounting structure is adapted for cooperative association with the indicating means of the tuning device to guide such means in its movement, and a part which serves to complete the cabinet also serves to provide the an tenna for the receiver.

These and other objects, and the manner in which they are obtained, will be fully understood from the following description based on the accompanying drawings which illustrate a preferred embodiment and in which:

Figurel is a front elevation of a radio receiver constructed in accordance with the invention;

Figure 2 is an enlarged view similar to Figure 1', with certain parts removed and otherparts broken away to illustrate certain characteristic structural features Figure 3 is an enlarged sectional view, taken substantially along line 3-3 of Figure 1; and

Figure 4 is an exploded view, in perspective and on an enlarged scale, showing the construction and relationship of the essential parts of the radio receiver.

Referring more particularly to the drawings, the radio receiver, as shown, comprises a cabinet or casing structure indicated, generally, at H] (see Figure 1) and a radio chassis designated, in its entirety, by the reference numeral H (see Figures 2 and 4').

The chassis includes a mounting support 12 and the usual main component parts of a receiver, such as tubes 13, I.-F. transformers M, tuning or variable condenser I5, combined onand-off switch and volume control It, and power transformer ll. The customary wiring and various small parts, such as resistors and capacitors, are suitably arranged inside the mounting support 12. This support, as shown, takes the form of a box-like member with a removable cover I8. The mentioned main component parts are mounted on the side Walls of said member and extendoutwardly from said walls, in a plane substantially paralleling the plane of the cover IB, so as to project substantially radially about the mounting support, as more clearly shown in Figure 2.

The cover I8 is provided with a centrally disposed outwardly projecting flange V I9. This flange provides an opening registering with the mouth of a loud-speaker 20 which, in accordafice with the invention, is advantageously mounted in and disposed axially of said box member, the usual speaker rim (not shown) being connected to the cover [8 by means of suitable securing elements 2Ia. A speakerprotecting grill 2| is suitably associated with the flange l9 to extend over the opening provided thereby. By associating the chassis and the speaker in the above described manner, said chassis and speaker constitute a unit which can be readily handled for assembly with the cabinet or casing structure I I.

As represented in the drawings, the cabinet or casing structure includes a pair of confronting symmetric panels 22 and 23 which are constructed of suitable material, such as wood or composition board. One panel 22 provides the back of the cabinet, and the other panel 23 provides the front of the cabinet. The chassisbined switch and volume control is adapted t' extend. As represented in Figure 1, the usual manually operable knobs 29 and 38 are providedon the extended ends of the actuating shafts to operate the same.

The back panel 22 and the front panel 23 are advantageously retained in assembled relationship by means of a split annular band 3| which, for that purpose, is provided with peripheral channel portions 32 and 33. As more fully illustrated in Figure 3, one channel ,portion 32 engages the marginal edge portion of rear panel 22, and the other channel portion 33 engages the marginal edge portion of the front panel 23. The extremities of band 3! terminate with angularly depending projections 34 which are adapted to be connected, by means of suitable securing elements 35, to opposite ends of a block 36. This blockv is fixed on a base 3'! for the receiver cabinet structure. Relative rotational movement or;displacement between the panels is prevented by means of extensions 38 on panels 22 and 23, which extensions are adapted for abutting engagement with the ends of channeled portions of band 3|. It is to be noted that the length of block 36 and the dimension of panel extensions 33 are such that when the angular projections 34 of the band are properly connected with the ends of the block, said band clampingly embraces the panels and thus serves not only to connect the panels but, also, to complete the cabinet or casing structure.

In practice, the band 3| is further adaptedto serve as a single turn high Q loop antenna and is preferably constructed of aluminum, although any other suitable material may be employed. Leads 39 are conveniently taped to the end portions of the loop and connected with suitable terminals 40 on the chassis.

The front panel 23 of the cabinet or casing is provided with a suitable scale 4| arranged about a part of the central Opening in said panel. This scale cooperates with a movable pointer element 42 to give visual indication of the tuning of the radio to resonance with a desired station in response to adjustment of the variable condenser l5. For that purpose, and in accordance with the invention, use is advantageously made of the flange IS on cover iii of the chassis. As more clearly shown in Figure 2, the outer cylindrical surface of the flange provides a track on which a cord 44 rides, a spring 45 being included in the length of the cord to maintain it under proper tension. The cord is connected with the pointer element 42 and is passed in engagement with a pulley 46 which is rigidly aifixed on the actuating shaft 26 of the variable condenser. The pointer element is constructed in such a manner as to pass and to slide between adjacent edges of the speaker grill 2! and of the front panel 23. By means of the above described arrangement, it will be understood that rotation of the shaft 26 through manipulation of the knob 29 causes the cord 44 to slide on the outer surface of flange i9 and, in turn, movement of the cord causes the pointer element 42 to slide along the scale 4|.

From the foregoing description, it will be appreciated that the invention provides a simple and characteristic arrangement which makes it possible to construct a compact selfcontained radio receiver which, when standing on its base 31, occupies little space on a table Or on a shelf, or like supports. It will, of course, be understood that if desired, the receiver may be hung on a wall or like surfaces. It will also be appreciated that a construction according to the invention is 'most advantageous in that a part serving to complete the cabinet or housing structure can be employed as an antenna for the receiver, and in that the peculiar relationship of the speaker and its grill with the associated portions of the cabinet structure provides adequate and simple arrangement for guiding the movement of the indicating element of the tuning device.

I claim:

1. A radio receiver comprising a radio chassis including a box-like member, a speaker mounted in said member, and a cabinet enclosing said chassis; said cabinet including a pair of confront; ing panels between which the chassis is mount ed, and an antenna structure arranged between the panels and cooperating therewith to complete the cabinet.

2. A radio receiver comprising a radio chassis including a box-like member having a cover provided with an opening, a speaker enclosed in said member and having its mouth in registry with said opening, a cabinet including a back panel and a front panelbetween which the chassis is mounted, the front panel having an opening disposed to register with the speaker mouth, and an antenna structure arranged between the panels and cooperating therewith to complete the cabinet.

3. A radio receiver comprising a radio chassis including a box-like member having a .cover provided with a substantially centrally disposed and outwardly projecting flange defining an opening, a speaker enclosed in said member and having its mouth in registry with said opening, a cabinet structure including a pair of confronting substantially circular panels, one panel forming the backof the cabinet and supporting thechassis, the other panel forming the front of the cabinet and having an opening disposed to register with the opening in said cover, and a generally annular band arranged about the marginal edges of said panels to complete the cabinet, said band providing a single turn high "Q loop antenna for the receiver.

4. A radio receiver comprising a radio chassis including a mounting support and radio component parts mounted to extend outwardly and substantially radially of said support, a speaker arranged axially of said support, and a pair of confronting panels between which the chassis is mounted, said panels extending substantially perpendicularly to the axis of the speaker.

5. A radio receiver comprising a radio chassis including a mounting support and radio component parts, said support consisting of a boxlike member and said parts being arranged on the side Walls of said member to extend outwardly and substantially radially therefrom, a speaker mounted in and disposed axially of said member, and a pair of confronting panels between which the chassis is mounted, said panels extending substantially perpendicularly to the axis of the speaker.

arranged axially of said support, a pair of confronting panels between which the chassis is mounted, said panels extending substantially perpendicularly to the axis of the speaker, and an antenna structure arranged in cooperative relationship with said panels to provide a casing for said chassis.

7. A radio receiver comprising a radio chassis including a mounting support and radio component parts, said support consisting of a boxlike member and said parts being arranged on the side walls of said member to extend outwardly and substantially radially therefrom, a speaker mounted in and disposed axially of said member, a pair of confronting panels between which the chassis is mounted, said panels extending substantially perpendicularly to the axis of the speaker, and a band between and in engagement with the marginal edges of the panels to interconnect the same, said band providing a single turn high Q loop antenna for the receiver.

8. A radio receiver comprising a radio chassis of the speaker grill and associated panel, and a scale on the latter panel in cooperative relationship with said pointer element.

10. A radio receiver comprising a chassis including a box-like member having a cover provided with a substantially cylindrical outwardly projecting flange defining an opening, a speaker enclosed in said member and having its mouth in registry with said opening, a speaker-protecting including a box-like member having a cover provided with a substantially cylindrical outwardly projecting flange defining an opening, a speaker enclosed in said member and having its mouth in registry with said opening, a cabinet structure including a pair of panels between which the chassis is mounted, one panel having an opening disposed to register with said opening defining flange, and tuning indicator means for the receiver; said means having a flexible driving element arranged for riding engagement with said flange, a pointer element connected with said driving element and passing through the opening in said one panel, and a scale arranged on said one panel in cooperative relationship with said pointer element.

9. A radio receiver comprising a radio chassis including a box-like member having a cover provided with a substantially cylindrical outwardly projecting flange defining an opening, a speaker enclosed in said member and having its mouth in registry with said opening, a speaker-protecting grill associated with said flange to extend over said opening and speaker mouth, a cabinet structure including a pair of panels between which the chassis is mounted, one panel having an opening disposed to register with said grill to expose the same, and tuning means for the receiver; said tuning means having a flexible driving element arranged for riding engagement with said flange, a pointer element passing between adjacent edges grill associated with said flange to extend over said opening and speaker mouth, a cabinet structure including a pair of confronting substantially circular panels, one panel forming the back of the cabinet and supporting said chassis, the other panel forming the front of the cabinet and having an opening in registry with said grill to expose the same, a split generally annular band having peripheral channel portions in engagement with the marginal edges of the panels to interconnect the sameand to complete the cabinet, said band providing a single turn high Q loop antenna for the receiver, and tuning means for the receiver; said tuning means having a flexible driving element arranged for riding engagement with said flange, a pointer element passing between adjacent edges of the speaker grill and front panel and connected with the driving element to be driven thereby, and a scale arranged on said front panel in cooperative relation with said pointer element.

GEORGE ZINDEL, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,655,793 McCrey Jan. 10, 1928 1,768,954 Henning July 1, 1930 1,999,796 Zinser Apr. 30, 1935 2,030,344 Young Feb. 11, 1936 2,100,226 Stenberg Nov. 23, 1937 2,174,107 Kenney Sept. 26, 1939 2,199,555 Andrews May 7, 1940 2,388,567 Patterson Nov. 6, 1945 2,445,582 Melville July 20, 1948 FOREIGN PATENTS Number Country Date 604,353 Germany Oct. 1934 539,213 Great Britain Sept. 1, 1941 OTHER REFERENCES Radio-Craft for Feb. 1939, page 464, Figure B.

Gage, Encyclopedias of-Radio Receiving Sets, Gage Publ. Co. Inc. Copyright 1927. Copy in Division 8. Page 36 only. 

